Welcome to Cyclic 1D !

Cyclic 1D is an Internet-based nonlinear Finite Element program for execution of one-dimensional site amplification and liquefaction simulations (for level as well as mildly inclined sites). Here, You can build and analyze your own soil profiles, and view and download the computational results.

New users please take a look at the Introduction page for a short introduction of the computational model and tips on how to use this site. There, you can also check if your web browser renders Java Applets properly, as all computation results will be displayed using Java Applets.

Experienced users may go to Model Builder directly to build a new model or check your last model, or go to Results to view your previous simulation results.

To learn more about the theoretical background of the Cyclic 1D program, please visit References for a list of relevant publications.

A Windows version of Cyclic 1D can be downloaded here . This version is compatible with Windows 98/NT/2000/XP.

We are grateful to our sponsors for supporting the development of the Cyclic 1D program and this web site. The sponsors include Pacific Earthquake Engineering Research Center and United States Geological Survey.

The Cyclic 1D program was developed by: Ahmed Elgamal, Zhaohui Yang, Ender Parra and Ahmed Ragheb. This web site was developed by: Zhaohui Yang, Jinchi Lu, Chester Chan, Hy Tran, and Ahmed Elgamal.

Disclaimer: This site is in an experimental research phase, and the results are for demostration purposes only. Other than this demonstration, this web-site and the computed results should NOT be used for any purpose whatsoever.